export function useParent(name, onEffect) {
  const path = `../${name}/index`;
  return {
    relations: {
      [path]: {
        type: 'ancestor',

        linked() {
          onEffect && onEffect.call(this);
        },

        linkChanged() {
          onEffect && onEffect.call(this);
        },

        unlinked() {
          onEffect && onEffect.call(this);
        }

      }
    },
    mixin: {
      created() {
        Object.defineProperty(this, 'parent', {
          get: () => this.getRelationNodes(path)[0]
        });
        Object.defineProperty(this, 'index', {
          // @ts-ignore
          get: () => {
            var _a, _b;

            return (_b = (_a = this.parent) === null || _a === void 0 ? void 0 : _a.children) === null || _b === void 0 ? void 0 : _b.indexOf(this);
          }
        });
      }

    }
  };
}
export function useChildren(name, onEffect) {
  const path = `../${name}/index`;
  return {
    relations: {
      [path]: {
        type: 'descendant',

        linked(target) {
          onEffect && onEffect.call(this, target);
        },

        linkChanged(target) {
          onEffect && onEffect.call(this, target);
        },

        unlinked(target) {
          onEffect && onEffect.call(this, target);
        }

      }
    },
    mixin: {
      created() {
        Object.defineProperty(this, 'children', {
          get: () => this.getRelationNodes(path) || []
        });
      }

    }
  };
}